<!DOCTYPE html>
<html>
    <head>
        <script src="../js/vue.js"></script>
    </head>
    <body>
        <div id="app1">
            {{title}}
        </div>
        <div id="app2">
            {{title}}
        </div>
        <script>
            var Vue2 = Vue.extend({
                data(){
                    return {
                        title:'hello'
                    }
                }
            });

            var vm1 = new Vue({
                el:'#app1'
            })
            var vm2 = new Vue2({
                el:'#app2'
            })
        </script>
    </body>
</html>